Gripper mechanism for pulling-over machines.



W. W. DARNILL.

GRIPPER MECHANISM FOR PULLING-OVER MACHINES.

APPLICATION FILED MAR. 2. I914.

Patented Dec. 7, 1915.

STATES MACHINERY COMPANY, or PATERSQN,

JERSEY.

NEW JERSEY, A CORPORATION or nnw GRIrrER MECHANISM r03 PULLING-OVVER MACHINES. f

Specification of Letters 2mm. t t D 7, 915,

Application filed March 2, 1914. Serial N 0. 821,993

To all whom z'ttmay concern: 1 I

Be it known that I, WALTER WILIRID i ,DARNILL, a subject of the King of England,

residing at Leicester, 'Leicestershire, England, have invented certain Improvements 1n Gripper Mechanisms for Pulling-Over Machines, of which the following o description,in connection with the accompanying drawingsyis a specificatiomalike reference Characters on the drawings indicating like parts in the several figures This invention comprises a improvements in or relatingito pulling-over or like machines and relates particularly to machines of the type described and shown in "131101 United States Letters Patent N0. 1,030,522, granted June 25,1912, on application of RonaldFuMcFe'ely. In machines of this type thereare provided'a gripper for the toe of the shoe and two grippers for each side of the shoe and operating mechanism for drawingthe grippers upwardly to pull the upper @over the last. The grippers of each oflthe side gripper mechanisms are mounted side by side in a single carrier and the gripping faces of one gripper are substantially in alinement with the gripping faces of theother gripper. It has been found that owing to the curvature of the last the gripping faces of the rear gripper do not lie parallel tothat portion of the last which they are opposite, and consequently the uppercannot be. readily engaged by the grippers, a difficulty which it is an object of the present invention to overcome. Furthermore withthe gripping faces of both grippers in alinement the upper is notpulled over the last man even fashion. but'is sub jected to local stress, In accordance with the present invention these difliculties are overcome by providing. for a pulling-over or like machine comprising .a plurality of side grippers preferably connected with a single operating mechanism, an arrangenient ofthe said grippers wherein the gripping faces of one gripper and the gripping faces of the other gripper are at an angle to one another, so that thegrippingfaces of each gripper shall lie in a position sub,- stantially parallel with that part of thelast which each is opposite. In a convenient mit *bodiment of the invention this is carried into effect by constructing the rear grippers so that their gripping faces are twisted, with relation tothe mechanism that carries them, through an angle such that when the gripping faces ofthe frontgrippers are'in a position substantially parallel to the portion of the lastwhich they are opposite the gripping faces of tlie rear grippers will also be substantially parallel to that part of the side/of thellas't'which they'are opposite. Preferably also while the front grippers will have on the gripping faces of their jaws lines-of corrugations formed as usual to extend substantially parallel with the bot- "tom' ofthefforepart of the last, the rear grippers will have on their gripping faces lines of corrugations inclined downwardly and backwardly at an angle to those'on the front grippers for the purpose of better seizing and holding the'upper extending toward the shank of the shoe. The rear'jaws may have their lower edges inclined downwardly and backwardly relatively to the plane of the forepart of the shoe bottomfor thesame purpos. a

While the invention has been described as embodied in a construction wherein the back jaws are twisted relatively to their carrying mechanism it is to be understood that it is not limited to this precise construction, for it is within the scope of the inventionto form the gripping faces on parts separate from i3l16-16St of the gripper, the parts being locked together by any suitable means so that. the gripping faces can be adjusted into a position substantially parallel opposite. a

@The features of the invention will appear I 1 morefully in connection with the following description: of "a preferred embodiment thereof illustrated in the accompanying drawingsv and the invention will be particularly pointed out in the claims at the end of the description.

,Figure 1" shows the machine of said prior patent equipped with thisinvention. Fig. 2,;show's in plan view the relation'of the known in theartand the operating mech= anism for the grippers may also be like that shown. There is onegripper at the toe and two grippers for engaging each side of the shoe, each side gripper mechanism comprising front and rear pairs of jaws 1, 2, 3 and 4: of which the jaws 1 and 3 are fixed upon their carriers ,5, (Sand the jaws 2 and4 are 'pivotedtosaid carriers, and an operating bar 8 extending to a cam operated leverlO has connection with both carriers 5 and 6 forclosing and uplifting the jaws. There is preferably an equalizing or compensating connection, not shown, between the front and rear grippers to permit the relative movement that is desirable-because of the difierences in shape of the portions of the last over which extend the respective belts of upper to the end of which the front and rear grippers on the opposite sides of the last are connected for pulling over.

The gripping faces of the rear pair of jaws 3, 1 and the gripping faces of the front pair of jaws 1, Qare at an angle to one an other, as shown bestin Fig. 2, so that the gripping faces of each shall lie in a position substantially parallelwith that part of the last side or edge towhich each is opposite, as is clearly indicated in Fig. 2. This arrangement is efiected by constructing the rear gripper so that its gripping faces are twisted, as shown in Fig. 2, with relation to their carriers 6, through an angle such that when the gripping faces of the front gripper are in a position substantially parallel to the edge or side of the ball portion of the last to which they are opposite the gripping faces of thecrear gripper will be inclined rearwardly and inwardly substantially parallel to that adjacent portion of the edge of the last which extends toward the shank.

Also preferably and as shown best in Fig. 4,.

while the front gripper has corrugations on its grippingfacesithat extend in lines substantially parallel to the plane of the. forepart of the last the rear gripper has lines of corrugations which are inclined downwardly and backwardly relative to those on the front gripper for better seizing and pulling Having'explained this invention,"its pur-' pose, and the preferred construction embodying the same, I claim as new and desire to secure by Letters-Patent oftheUnited States 1. A pulling-over machine having in combination, two grippers for engaging adjacent portions of stock, and suitable operating mechanism including means to eifect uptwo grippers for engagingthe same side of the shoe, and a. single actuator for effecting the operation of said grippers, one gripper being adapted to engage the upper at the side of the ball nearthe-tip seam and the othernear the incurve of the'last edge leading to the shoe shank, said latter pair of jaws having its. gripping faces angled relatively to the otherpair and fixed in such relative angular relation to adapt it to pull the last in approximately a uniform manner with the other pair of jaws. V 8. A pulling-over machine having in combination, suitableoperating mechanism, two

relatively to the adjacent curved edge of grippers for engagingstock on the same side of the shoe, and a single actuator for said grippers, the rear gripper having its gripping faces twisted with respect to the gripping faces of the front gripper and inclined obliquely downwardly and rearwardly relatively to the plane of the last bottom.

4. A pulling-over machine having in combination, suitable operating mechanism, two grippers for engaging adjacent portions of stock and a single actuator for said grippers, each of said grippers comprising two cooperating aws, one of which is plvoted and the gripping faces of. one pair of jaws lying in a plane at an angle to theaxis of its pivot.

5. A pulling-over machine having, in combination, suitable carrying and operating mechanism, and front and rear pairs of side grippers, the front pair having lines of corrugations on its gripping faces arranged to extend substantially parallel with the plane of the last bottom and the rearpair of jaws having lines of corrugations on its gripping faces inclined downwardly and backwardly at an angle to those onthe front pair. V

6. A pulling-over machine having, in combination, suitable carrying and operating mechanism, and front andrear pairs of 'side'grippers,the front pair of jaws being 1,1'e3,5ss s23 substantially parallel With the plane of the name to this specification in the presence of shoe bottom and the rear pair of jaws havtWo subscribing Witnesses. ing their gripping faces extending doWn- WVALTER WILFRID DARNILL. wardly and backwardly relative to the front Witnesses: 5 pair for the purpose described. FREDERICK WILLIAM WORTH,

In testimony whereof I have signed my KATHERINE PEXTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

